Botanical name: Cereus peruvianus
Also known as Peruvian Apple Cactus or Queen of the Night.
These are very easy to grow indoors and need very little attention. Two of the main things to take care of is using a good draining cacti soil, and plenty of bright light
Light: The Peruvian apple cactus loves bright sun light, although avoid placing in direct sun.
Water: Water this plant more often in the summer and much less in the winter time. Their natural habitat is dry and they store water within the stems. Water this plant when the soil begins drying out, throughout spring and late summer. In late summer reduce watering until the next spring and allow the soil to be fairly dry.